[Intel-gfx] [PATCH] drm/i915: Always call to intel_display_set_init_power() in resume_early.

[Imre Deak]

On Tue, Jan 16, 2018 at 04:53:24PM +0100, Maarten Lankhorst wrote:
> intel_power_domains_init_hw() calls set_init_power, but when using
> runtime power management this call is skipped.

It's skipped during suspend-to-idle. 

> This prevents hw readout from taking place.
> 
> Signed-off-by: Maarten Lankhorst <maarten.lankhorst at linux.intel.com>
> Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=104172
> Cc: imre.deak at intel.com

Fixes: 4900727d35bb ("drm/i915/skl: enable PC9/10 power states during suspend-to-idle")

Thanks for following up on this,
Reviewed-by: Imre Deak <imre.deak at intel.com>

> ---
>  drivers/gpu/drm/i915/i915_drv.c | 2 ++
>  1 file changed, 2 insertions(+)
> 
> diff --git a/drivers/gpu/drm/i915/i915_drv.c b/drivers/gpu/drm/i915/i915_drv.c
> index 9cace8732dcf..4cecf5c01265 100644
> --- a/drivers/gpu/drm/i915/i915_drv.c
> +++ b/drivers/gpu/drm/i915/i915_drv.c
> @@ -1836,6 +1836,8 @@ static int i915_drm_resume_early(struct drm_device *dev)
>  	if (IS_GEN9_LP(dev_priv) ||
>  	    !(dev_priv->suspended_to_idle && dev_priv->csr.dmc_payload))
>  		intel_power_domains_init_hw(dev_priv, true);
> +	else
> +		intel_display_set_init_power(dev_priv, true);
>  
>  	i915_gem_sanitize(dev_priv);
>  
> -- 
> 2.15.1
>